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Method for purifying penicillin production waste liquid and recycling sodium sulfate

A technology of sodium sulfate and penicillin is applied in chemical instruments and methods, alkali metal sulfite/sulfate purification, energy and wastewater treatment, etc. Significant economic and environmental benefits, reducing governance difficulty and costs, and recycling green effects

Active Publication Date: 2014-08-13
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the production process of penicillin, since ammonium sulfate is one of the nitrogen sources for fermentation, sulfuric acid and sodium hydroxide are important pH regulators in the extraction and refining process, so that the concentration of sulfate in penicillin wastewater can reach more than 7000mg / L, This brings great difficulties to the anaerobic treatment of wastewater
At present, the treatment of penicillin wastewater at home and abroad generally adopts aerobic biochemical treatment, but because the COD of wastewater is too high, it needs to be diluted about 10 times before it can enter the biochemical device. low efficiency
Therefore, in recent years, anaerobic biochemical approaches have been explored at home and abroad to treat penicillin wastewater. However, due to the presence of a large number of sulfate ions, surfactants, penicillin and its degradation products in penicillin wastewater, it has a serious inhibitory effect on anaerobic microorganisms. , the processing effect is not ideal

Method used

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  • Method for purifying penicillin production waste liquid and recycling sodium sulfate
  • Method for purifying penicillin production waste liquid and recycling sodium sulfate
  • Method for purifying penicillin production waste liquid and recycling sodium sulfate

Examples

Experimental program
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Effect test

Embodiment 1

[0023] The process of purifying penicillin production waste liquid and recovering sodium sulfate, such as figure 1 shown.

[0024] The content of sodium sulfate in the penicillin wastewater used in the experiment was 11.4618g / L.

[0025] Concentrate the raw material waste liquid by a certain number of times (volume is about 1 / 4 of the raw material liquid), so as to fully remove the butyl acetate in the raw material liquid. Add 1 g of powdered activated carbon to the concentrated raw material solution per 100 mL of waste liquid, heat and stir at 80 ° C for 1 h, and filter to obtain a decolorized solution. The decolorizing solution is heated, evaporated and concentrated, and the concentration is stopped when the volume is about one-third of the decolorized solution, and the decolorized concentrated solution is cooled. Add solid NaOH to the decolorized concentrated solution and keep stirring until the liquid changes from acidic to neutral, with a pH of about 7.0-7.2, and filter...

Embodiment 2

[0034] A method for purifying penicillin production waste liquid and reclaiming sodium sulfate, such as figure 1 shown, including the following steps:

[0035] (1) the penicillin production waste liquid first flows into the evaporator and carries out preliminary evaporation, evaporates the extractant butyl acetate in the fermentation filtrate, and continues to evaporate to obtain the concentrated raw material solution that the sodium sulfate concentration is 40g / L;

[0036] Among them, the penicillin fermentation feed liquid is separated from the solid and liquid to obtain the filtrate, and the filtrate is extracted with butyl acetate, and the raffinate is the penicillin production waste liquid. The content of sodium sulfate in the penicillin production cost is 9g / L, and the protein content It is 1.8g / L, COD is 40000mg / L.

[0037] (2) Add activated carbon to the concentrated raw material solution, add 0.5 g of activated carbon to every 100 ml of concentrated raw material solu...

Embodiment 3

[0043] A method for purifying penicillin production waste liquid and reclaiming sodium sulfate, such as figure 1 shown, including the following steps:

[0044] (1) the penicillin production cost first flows into the evaporator for preliminary evaporation, evaporates the extractant butyl acetate in the fermentation filtrate, and continues to evaporate to obtain the concentrated raw material solution that the sodium sulfate concentration is 50g / L;

[0045] Among them, the penicillin fermentation feed liquid is obtained after solid-liquid separation, and the filtrate is extracted with butyl acetate, and the raffinate is the penicillin production waste liquid. The content of sodium sulfate in the penicillin production waste liquid is 15g / L, and the protein The content is 3g / L, and the COD is 65000mg / L.

[0046] (2) Add activated carbon to the concentrated raw material liquid, add 2 g of activated carbon to every 100 ml concentrated raw material liquid, heat to 85 ° C, and stir fo...

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Abstract

The invention relates to a method for purifying a penicillin production waste liquid and recycling sodium sulfate. The method comprises the following steps: firstly, primarily evaporating the penicillin production waste liquid; concentrating a raw material liquid in desorbing residual solvents in the waste liquid; adding activated carbon into the primarily concentrated raw material liquid, wherein the liquid phase obtained from separation is a destaining solution of which a part of organisms are removed; continuously evaporating the destaining solution to obtain a concentrated destaining solution; adding alkali into the concentrated destaining solution, reacting to remove the impurities, filtering and precipitating, wherein an obtained liquid is an alkali treated liquid; adding a dilution agent for dilution crystallization into the alkali treated liquid, performing solid-liquid separation, and recrystalizing the solid, thereby obtaining high-purity sodium sulfate crystal; feeding a liquid into a solvent recycling tower for recycling the dilution agent, and feeding a tower kettle liquid to a biochemical pool for treatment. Compared with the prior art, organisms such as protein and pigment in the penicillin production waste liquid are reduced, at the same time sodium sulfate is recycled, then circulation application of sodium sulfate and water is achieved, the treatment difficulty and cost of the penicillin production waste liquid are remarkably alleviated and lowered, and great economic and environment benefits are achieved.

Description

technical field [0001] The invention relates to a method for treating waste liquid, in particular to a method for purifying penicillin production waste liquid and recovering sodium sulfate. Background technique [0002] In the production of the chemical industry, a large amount of waste water is often discharged, which contains harmful wastes that pollute the environment, and some waste water can be separated and recycled by various physical and chemical methods. While treating waste water, the resource utilization of harmful pollutants is realized. . Such as Chinese patent CN102351357A has described a kind of treatment and utilization method to the waste water containing phenol and sodium sulfate, obtains product sodium sulfate by evaporative concentration, crystallization by cooling. Chinese patent CN102745755A relates to the process of recovering sodium sulfate from sebacic acid production wastewater, which uses continuous evaporation to obtain sodium sulfate crystals. ...

Claims

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Application Information

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IPC IPC(8): C02F9/10C01D5/16C02F103/36
CPCY02W10/37
Inventor 陈葵纪利俊朱家文东健伊王亚邵阳康武斌吴艳阳
Owner EAST CHINA UNIV OF SCI & TECH
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